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Projectile penetration and perforation of high performance concrete: Experimental results and macroscopic modelling
Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, The Institute of Technology.
Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, The Institute of Technology.
2006 (English)In: International Journal of Impact Engineering, ISSN 0734-743X, E-ISSN 1879-3509, Vol. 32, no 7, 1068-1085 p.Article in journal (Refereed) Published
Abstract [en]

Experiments and simulations of penetration and perforation of high performance concrete targets by steel projectiles have been carried out. A Doppler radar monitored the projectile pre-impact velocity history and a high-speed camera captured the projectile residual velocity. A continuum mechanical approach and the finite-element method were used for the simulations. The targets were modelled with the K&C concrete model. For perforation the computational results show acceptable agreement with the experimental results, but not for penetration. The article is concluded with suggestions on how to better model concrete material for the current application.

Place, publisher, year, edition, pages
Pergamon Press, 2006. Vol. 32, no 7, 1068-1085 p.
Keyword [en]
High performance concrete; Projectile; Penetration; Perforation; Experiments; Finite-element analysis
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-13412DOI: 10.1016/j.ijimpeng.2004.11.003OAI: oai:DiVA.org:liu-13412DiVA: diva2:20686
Available from: 2005-11-09 Created: 2005-11-09 Last updated: 2017-12-13
In thesis
1. On failure modelling in finite element analysis: material imperfections and element erosion
Open this publication in new window or tab >>On failure modelling in finite element analysis: material imperfections and element erosion
2005 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This dissertation concerns failure modelling with material imperfections and element erosion in finite element analyses. The aim has been to improve the element erosion technique, which is simple to use and implement and also computationally inexpensive. The first part of the dissertation serves as an introduction to the topic and as a summary of the methodologies presented in the following part. The second part consists of seven appended papers. In paper A the standard element erosion technique is used for projectile penetration. In papers B and C a methodology that accounts for size effects is developed and applied to crack initiation in armour steel and tungsten carbide. A methodology to better predict the stress state at crack tips with coarse meshes is presented and applied to armour steel in paper D. Papers E and F concern the development of selective mass scaling which allows for larger time steps in explicit methods. Finally, in paper G the previously presented methodologies are used in combination and validated against experimental results on tungsten carbide. The computations show good agreement with the experimental results on failure initiation for both materials, while the computational results on the propagation of cracks show better agreement for the armour steel than for the tungsten carbide.

Place, publisher, year, edition, pages
Institutionen för konstruktions- och produktionsteknik, 2005
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 973
Keyword
finite element method, element erosion, material failure, material imperfections, crack-tip
National Category
Applied Mechanics
Identifiers
urn:nbn:se:liu:diva-4679 (URN)91-85457-34-5 (ISBN)
Public defence
2005-12-02, C3, C-huset, Campus Valla, Linköpings universitet, Linköping, 10:15 (English)
Opponent
Supervisors
Note
On the day of the public defence of the doctoral thesis, the status of articles I, III and IV was Accepted and article VII was Submitted.Available from: 2005-11-09 Created: 2005-11-09 Last updated: 2010-04-06

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Nilsson, Larsgunnar

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